Improvement in car-trucks



E. THURSTON 8: J. R. LEDYARD. GAR TRUOK.

' No. 47,880. Patented May 23, 1865.

UNITED STATES PATENT OFFICE.

EDWIN m-uasron AND JAMES B. LEDYARD, OF oovme'rou, KENTUCKY IMPROVEMENT IN CAR-TRUCKS.

Specification forming part of Letters Patent No. 47.880, dated May 23, 1865.

To alt whom it may concern.-

Be it known that we, EDWIN TnURs'roN and JAMES It. LEDYARD, of Covington, in thescription ofthe construction of the samc,reference'being had to the annexed drawings and letters of reference marked thereon, making a part of this specification, inwhich- Figure 1 is a front elevation through middle of truck,- showing bolsters B and 0, also end piece, A, with manner of putting same together; Fig. 2 is an end elevation of truck with portion of end piece, A, detached, showing ends of bolsters B and 0.. v Fig. 3 shows top view of. end casting,A. Fig. 5 shows top view or plan of top bolster, B. Fig, 4 shows top view or plan of bottom bolster, (l.

Thcarch-bars, friction-irons, boxes, springs,

and center-bearing casting areol'd, so that we make no claim upon them.

The nature of our invention consists in construction and use of skeleton iron bolsters with east end pieces or housings, put together in the manner herein described, and shown forth in the annexed drawings.

To enable others skilled in the arts to make and use our invention, we describe its construction as follows:

Fig. 5: The top bolster, B, we form of two pieces. of T-iron, placed parallel, upon the top and each end of which are fastened by rivets or bolts the plates 1, as shown in annexed drawings, the outer corners, 2', of which are cut out so as to work in cast end-pieces, A.

The friction irons 3 are also fastened on these same plates. The central plate, 1-,is for the further securance of center-bearing casting 3. Fig. 4: The bottom bolster, G, is also formed of two pieces of Tiron, placed parallel, and uponwhich, at each end, inside of" arch-bars, are fastened by bolts or rivets the plates 5, which afford a bed for springs to rest on.

Fig. 3 The east end piece, A, is made of-any desired form, so v as to answer-the purpose of a brace for arch-bars 4 as well as for bottom bolster, G, and also a guide and stop for top bolster, B, as shown forth in annexed drawings; What we claim as-our invention, and desire to secure by Letters Patent, is as-follows:

l. The construction and use of skeletoniron bolsters B and G, which admit of great strength and durability, and be used either as center bearings or'side bearing.

2. The construction and use of the castend piece, A, which serves to'stilfen and brace arch- -bars and lower bolster, also serves'as a guide for top bolster to work in, and, in connection with bolsters, forming a truck, combining strength, durability, and lightness, with ease of access in all its parts for repairs.

EDWIN THURSTON. JAMES R. LEDYARD. Witnesses: J .'L. HAGKATHORN,

Q, A. KEITH. 

